4. The compound iron sulfide can be formed by filtering b. evaporating c. heating
d. mixing
a.

heating :

Explanation:

the same as the last answer i posted... sorry it just came up in my recommended questions to answer

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.

because of all the things that happen around the us, many people get into arguments which sadly could get physical, but we should actually make a change for that.